Air-motor.



3 SHEETS-SHEET l.

Patented M124, 1914.

J. R. KINNEY.

Inventor.'

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J. R. KINNBY.

AIR MOTOR. APIPLIGATION ILBD FEB. 10, 1913.

Patented Feb. 24, 1914.

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J. R. KINNEY.

AIR MOTOR.

APPLIOATION FILED-PM10, 191s.

Patented Feb. 24, 1914.

3 SHEETS-SHEET 3.

Witnesses: Invenor:

UNTTED STATES PATENT OFFICE.

JUSTUS R. KINNEY, OF BOSTON, MASSACHUSETTS.

AIR-MOTOR.

To all t0/wm it may concern.'

Be it known that I, JUsrUs R. KINNEY, a citizen of the United States of America, and a resident of Boston, in the county of Suffolk and Stat-e of Massachusetts, have in vented certain new and useful Improvements in Air-Motors, of which the following is a specification.

The invention relates to air motors and particularly to that type of motors in which a piston is reciprocated by a supply of compressed air intermittently admitted to the piston chamber, the main obj ect of the present invention being to provide a single valve mechanism for controlling the admission of the motive agent and providing subsequently for the exhaust thereof, said valve mechanism being positively operated at predetermined times by the reciprocatory movement of the piston. l

The invention consists in controlling both the admission and the exhaust of the motive agent by a single valve mechanism.

The invention further consists in a tubular valve member provided with two sets of ports one of which communicates at all times with the piston chamber, while the other set is adapted to communicate alternately with the inlet and outlet as the piston approaches the end of its stroke in opposite directions.

The invention further consists in a friction device to retain said valve member in a normal stationary position until positively moved by the reciprocation of Ithe piston.

The invention further consists in providing the piston with a cylindrical member movable therewith adapted to receive the end of the tubular valve which is provided with a shoulder adapted to engage a shoulder on said piston to move said valve in unison with said piston a limited distance in one direction, while the end of said cylindrical extension is adapted to engage the end of said tubular valve to move itin unison with said piston a limited distance in the opposite direction.

The invention consists further in certain novel features of construction and arrangement or parts which will be fully understood by reference to the description of the drawings and to the claims hereinafter given.

Of the drawings: Figure l represents a vertical section of a motor embodying the Specification of Letters Patent.

Application led February 10, 1913.

Patented Feb. 24, 1914. Serial No. 747,579.

planebeing on line 3 3 on Fig. 5. Fig. 4

represents a horizontal section on line 4*4 on Fig. 3, and Fig. 5 represents a horizontal section on line 5-5 on Fig. 3.

Similar characters designate like parts throughout the several figures of the drawings.

In the drawings, 10 represents the base of a casing 11. This casing 11 is provided at opposite ends with removable plates 127 each provided with a bearing 13 in which is adapted to rotate the crank shaft 14. The shaft 14: has formed therein a plurality of cranks 15 each connected by a link 16 with a piston 17. Each pis-ton 17 is adapted to reciprocate in a cylinder 18 threaded or otherwise secured to the casing 11. Each piston 17 is provided with an annular flexible packing 19 retained against an end of the piston 17 by means of an annular member 20 secured to the piston 17 by means of screws21. At the upper end of each of these cylinders 18 is secured a casing 22 the upper end of which is closed by means of a cap 23. This casing 22 is provided with a chamber' 24 having an inlet port 25 extending therefrom and communicating with a passage 26 through which compressed air or some other motive agent is adapted to be admitted to the chambers 24. A cylindrical passage 27 extends from each chamber 24 to the interior of one of the cylinders 18. Fitted to the passage 27 is a tubular valve member 28 having cut into its periphery an annular groove 29 from which extends a plurality of ports 30 communicating with the interior of said tubular member. This tubular member 28 is also provided with a plurality of radial ports 31 which are always uncovered and communi- 'cate with the interior of the cylinder 18. The tubular member 28 is shown in the drawings as being formed in two parts, the body portion 28 and a supplemental tubular part 32 of reduced diameter threaded to -thebody portion. It is obvious, however, that the tubular valve 28-32 may be made integral if desired. The lower end of the supplemental part 32 is provided with an outwardly extending flange 33 and above der; a reciprocating piston therein adapted to operate said crank mechanism; and'telescopic means controlled by said piston for admitting a motive agent to the closed end ot said cylinder and subsequently exhausting the same therefrom.

3. In a device of the class described, the combination of crank mechanism; a cylinder; a reciprocating piston therein adapted to operate said crank mechanism; a valve :['or controlling the admission of the motive agent to the closed end of said cylinder; and means on said piston for operating said valve. l

4. In a device of the class described, the combination of crank mechanism; a cylinder; a reciprocating piston therein adapted to operate said` crank mechanism ,a valve for controlling the admission of the motive agent to the closed end of said cylinder; and means on said piston for operating said valve at the end of the stroke of said piston in each direction.

5. In a device of the class described, the combination of a cylinder; a reciprocating piston therein; a valve for controlling the admission of the motive agent to said cylinder; means on said piston for operating said valve at the end of the stroke of said piston in each direction; and frictional means for retainingsaid valve in open position until positively closed by the movement of said piston.

6. In a device of the class described, the combination of a cylinder; a reciprocating piston therein; a valve for controlling the admission of the motive agent to said cylinder; means on said piston for operating said valve at the end of the stroke of said piston in each direction; members in rictional contact with the stem of said valve to retain it in open position until positively closed by the movement of said piston; and a spring clip surrounding said members.

7'. In a device of the class described, the combination of crank mechanism; a cylinder closed at one end; a reciprocating piston therein adapted to operate said crank mechanism; a valve for controlling the admission of the motive agent to the closed end of said cylinder; means coacting therewith to retain it in open position unt-il positively moved; and a telescopic connection between said valve and said piston adapted to positively close said valve at the end of the working stroke of said piston.

8. In a device of the class described, the combination of a cylinder; a reciprocating piston therein; a valve for controlling t-he admission of the motive agent to said cylinder; means coacting therewith to retain it in open position until positively moved; a closed cylindrical extension on said piston; a tubular member secured to said valve and provided with ports, said member ext-ending into said extension and having a lateral shoulder thereon; means on said piston with which said shoulder engages in the movement of said piston to effect a closing of said valve. Y

9. In a device of the class described, the combinationof a cylinder; a reciprocating piston therein; a valve for controlling the admission of the motive agent to said cylinder; means for coacting therewith to retain it in open position until positively moved; a closed cylindrical extension on said piston; a tubular member secured to said valve and provided with ports, said member extending into said extension and having a lateral shoulder thereon; means on said piston with which said shoulder engages in the movement of said piston to effect a closing of said valve; and a buiier spring interposed between said engaging means and said shoulder.

10. In a device of the class described, the combination of a cylinder; a reciprocating piston` therein; a-chambered member secured to the end of'said cylinder and having an inlet thereto for the motive agent; a valve in said chamber provided with a tubular stem extending longitudinally of said cylinder,isaid stem being provided with a plurality of ports and an engaging shoulder; means on said piston for engaging said shoulder to operate said valve at predetermined times; and frictional means for retaining said valve in open position until positively closed by the movement of said piston. Y

11. In a device of the class described, the combination of a cylinder; a reciprocating piston therein; a chambered member secured to the end of said cylinder and having an inlet thereto for the motive agent; a valve in said chamber provided with a tubular stem extending longitudinally of said cylinder, said stem being provided with a plurality of ports and an engaging shoulder; means o-n said piston for engaging said shoulder to operate said valve at predetermined times; rictio-nalmeans for retaining said valve in open position until positively closed by the movement of said piston; and means on said piston for positively opening said valve at the end of a predetermined movement of said piston.

12. In a device of the class described, the combination of a cylinder; a reciprocating piston therein; a chambered member secured to the end of said cylinder and having an inlet thereto for the motive agent; a valve in said chamber provided with a tubular stem extending longitudinally of said cylinder, said stem being provided with an engaging shoulder; means on said piston for engaging said shoulder to operate said valve at predetermined times, frictional means for retaining said valve in open position until positively closed by the movement of said piston; means on said piston for positively opening said valve at the end of a predetermined movement of said piston; an exhaust port in said chambered member; and i two sets of ports in said tubular stem onel set of which is adapted to register With said exhaust port at a predetermined position of said piston toy permit exhaust from said cylinder.

13. In a device of the class described', the l combination of af cylinder; a reciprocating piston therein; a chambered member secured to the end of said cylinder and having 'an inlet and outlet therein; a valve iny said` chamber provided With a tubular stem havymovements of said valve in opposite directions at predetermined times; 'andmeans for preventing movement of said valve except When Vpositively operated by the reciprocation of said piston. Y

14;. In a device of the class described7 the combination of a cylinder; a reciprocating piston therein; a lchambered member secured to the end of said cylinder and having an inlet and outlet therein; a valve in said chamber provided With a tubular stem havingtwo sets of ports therein; one of which sets is always in communication with the interior of said cylinder While the other set is adapted to alternately communicate With said exhaust port and the inlet chamber; a cylindrical extension on said piston into which the end of said valve stem extends and is adapted t-o reciprocate; said extension being provided With a closed end adapted to move said valve in one direction a limited distance; and means on said piston adapted to engage with said stem and move said valve in the opposite direction a limited distance.

15.111 a device of the class described, the combination of a cylinder; a reciprocating piston therein; a chambered member secured to the end of said cylinder and having an inlet and outlet therein; a valve in said chamber provided with a tubular stem having two sets oi ports therein, one of which sets is always in communication With the interior of said cylinder, While the other set is adapted to alternately communicate with said exhaust port and the inlet chamber; a cylindrical Aextension on said piston into which the end of said valve stem extends and is adapted to reciprocate, said extension being provided with a closed end adapted to move said valve in one direction a limited distance; means on said piston adapted to engage said stem and move said valve in the opposite direction a limited distance; and means preventing the movement of said valve except when positively operated by the reciprocation of said piston.

16. In a device of the class described, the combination of crank mechanism; a cylinder closed at one end; a reciprocating piston therein adapted to operate said crank mechanism; a chambered member secured to the end of said cylinder having an inlet and an outlet therein; and a single device reciprocable in said chambered member and oper able by the movementof said piston for closing the outlet and opening the inlet at the end of the stroke of said piston in one direction and closing the inlet and opening the outlet at the end of the stroke of the piston in the opposite direction.

Signed by me at 4 Post Oilice Sq., Boston; Mass., this 5th day of February, 1913.

` JUSTUS R. KINNEY.

Titnesses TA1/rim E. LOMBARD, NATHAN C. LOMBARD.

Copies of this patent may be obtained for vc cents each, by addressing the Commissioner of Patents. Washington. D. C. 

